Lifting Straps/Lifting Slings

Physical Factors Effecting Strength of Lifting Straps/Lifting Slings:Your care in the use and handling of lifting straps/lifting slings will prolong sling life significantly. The following physical factors should be considered when using any of the lifting slings mentioned here:

• Cutting - The number one cause of web sling damage/failure, usually caused by load edge movement against sling.
Temperature - Nylon & polyester are seriously degraded at temperatures above 194 F. • Improper Loading - Shock loading, unbalanced loading, over loading and inadequate consideration for the effect of angle factors can adversely effect strength. Punctures & Abrasions - These can seriously degrade lifting straps/lifting slings strength. Red
core yarns can aid in locating damaged webbing. • Foreign Matter - Material such as metal chips, weld spatter, heavy grit, etc.
can damage a web sling both internally and externally. • Ultraviolet Light - Nylon & polyester web lifting straps are adversely effected by prolonged exposure to UV light, i/e/ sunlight or arc welding. Slings appear bleached and stiff.• Sling Angle - is the angle measured between a horizontal line and the sling leg or body. This angle is very important and can have a dramatic effect on the rated capacity of the lifting strap/lifting sling. When this angle decreases, the load on each leg increases. This principle applies whether one sling is used to pull at an angle, in a basket hitch or for multi-legged bridle slings. Lifting strap/lifting sling angles of less than 30 degrees are not recommended.

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